# Starting, updating, or canceling a zonal shift
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This section provides procedures for working with zonal shifts, including starting a zonal shift and canceling a zonal shift.

## Starting a zonal shift
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The steps in this section explain how to start a customer-initiated zonal shift on the Amazon Application Recovery Controller (ARC) console. To work with zonal shift programmatically, see the [ Zonal Shift API Reference Guide](https://docs.aws.amazon.com/arc-zonal-shift/latest/api/Welcome.html).

In addition to starting a zonal shift in ARC, you can also start a zonal shift for a load balancer in the Elastic Load Balancing console (in supported Regions). For more information, see [Zonal shift](https://docs.aws.amazon.com/elasticloadbalancing/latest/application/zonal-shift.html) in the Elastic Load Balancing User Guide.

## To start a zonal shift


1. Open the ARC console at [https://console.aws.amazon.com/route53recovery/home#/dashboard](https://console.aws.amazon.com/route53recovery/home#/dashboard). 

1. Under **Multi-AZ**, choose **Zonal shift**.

1. On the **Zonal shift** page, choose **Start zonal shift**.

1. Select the Availability Zone that you want to shift traffic away from.

1. Select a supported resource from the **Resources** table to shift traffic away for.

1. For **Set zonal shift expiration**, choose or enter an expiration for the zonal shift. A zonal shift can set to be active initially for 1 minute or up to three days (72 hours). 

   All zonal shifts are temporary. You must set an expiration, but you can update active shifts later to set a new expiration period of up to three days. 

1. Enter a comment. You can update the zonal shift later to edit the comment, if you like.

1. Select the checkbox to acknowledge that starting a zonal shift will reduce available capacity for your application by shifting traffic away from the Availability Zone.

1. Choose **Start**.

## Updating or canceling a zonal shift
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The steps in this section explain how to update a zonal shift that you initiate, or cancel a zonal shift, on the Amazon Application Recovery Controller (ARC) console. To work with zonal shift programmatically, see the [ Zonal Shift API Reference Guide](https://docs.aws.amazon.com/arc-zonal-shift/latest/api/Welcome.html).

You can update a zonal shift to set a new expiration, or edit or replace the comment for the zonal shift. You can cancel a zonal shift any time before it expires.

You can cancel zonal shifts that you initiate, or zonal shifts that AWS starts for a resource for a practice run for zonal autoshift. To learn more about practice shifts in zonal autoshift, see [How zonal autoshift and practice runs work](arc-zonal-autoshift.how-it-works.md).

## To update a zonal shift


1. Open the ARC console at [https://console.aws.amazon.com/route53recovery/home#/dashboard](https://console.aws.amazon.com/route53recovery/home#/dashboard). 

1. Under **Multi-AZ**, choose **Zonal shift**.

1. Select a zonal shift that you want to update, and then choose **Update zonal shift**.

1. For **Set zonal shift expiration**, optionally select or enter an expiration.

1. For **Comment**, optionally edit the existing comment or enter a new comment.

1. Choose **Update**.

## To cancel a zonal shift


1. Open the ARC console at [https://console.aws.amazon.com/route53recovery/home#/dashboard](https://console.aws.amazon.com/route53recovery/home#/dashboard). 

1. Under **Multi-AZ**, choose **Zonal shift**.

1. Select a zonal shift that you want to cancel, and then choose **Cancel zonal shift**.

1. On the confirmation modal dialog, choose **Confirm**.